BACKGROUND OF THE INVENTION
Field of the Invention:
[0001] The present invention relates to a mobile communication system and, in particular,
to a method and apparatus for optimizing power consumption of a terminal in the mobile
communication system.
Description of the Related Art
[0002] Typically, the mobile communication system has been developed for the user to communicate
on the move. With the rapid advance of technologies, the mobile communication system
has evolved to the level capable of providing high speed data communication service
as well as voice communication service.
[0003] Recently, as one of the next generation mobile communication system, Long Term Evolution
(LTE) is on the standardization by the 3
rd Generation Partnership Project (3GPP). LTE is a technology designed to provide high
speed packet-based communication of up to 100 Mbps and aims at commercial deployment
around 2010 timeframe. In order to accomplish the aim, a discussion is being held
on several schemes: one scheme for reducing the number of nodes located in a communication
path by simplifying a configuration of the network, and another scheme for maximally
approximating wireless protocols to wireless channels.
[0004] Meanwhile, unlike voice service, the data service is provided on the resource determined
according to the data amount to be transmitted and channel condition. Accordingly,
the wireless communication system, especially cellular communication, is provided
with a scheduler manages transmission resource allocation in consideration of the
required resource amount, channel condition, data amount, etc. This is the fact in
the LTE system as the next generation mobile communication system, and the scheduler
located at the base station manages the transmission resource allocation.
[0005] More recently, discussions are focused on LTE-advanced (LTE-A) evolved from LTE with
the adaptation of various novel techniques. In Release 11, Diverse Data Application
(DDA) has been introduces as a part of Work Item (WI) for reducing power consumption
of the terminal. In association with the WI, various studies are being conducted in
order to optimize the power consumption of the terminal.
[0006] US 2010/110897A1 discloses a method for discontinuously monitoring downlink control channel in a user
equipment in a wireless communication system, comprising: receiving a discontinuous
reception (DRX) Start Offset from a base station to be used for both a first DRX Cycle
and a second DRX Cycle; and starting an On Duration Timer at a subframe that satisfies
either a first condition for the first DRX Cycle or a second condition for the second
DRX Cycle, wherein a first DRX offset used in the first condition is based upon the
DRX Start Offset received from the base station, and wherein a second DRX offset used
in the second condition is based upon a remainder of the DRX Start Offset received
from the base station after a modulo operation by the second DRX Cycle.
Disclosure of Invention
Technical Problem
[0007] The present invention proposes a method for optimizing the power consumption of a
terminal, and it is an object of the present invention to provide a method and apparatus
for changing discontinuous reception operation settings efficiently according to the
traffic properties in the radio communication system supporting various data traffics
so as to optimize the power consumption of the terminal.
Solution to Problem
[0008] In order to solve the above problem, a power consumption optimization method of a
terminal in a mobile communication system includes determining whether a discontinuous
reception configuration of the terminal is necessary to be changed; and transmitting,
when necessary to be changed, a discontinuous reception configuration change request
message to a base station.
[0009] Also, a terminal for optimizing power consumption in a mobile communication system
includes a transceiver which transmits and receives data or control signals to and
from a base station; and a controller which controls determining whether a discontinuous
reception configuration of the terminal is necessary to be changed and transmitting,
when necessary to be changed, a discontinuous reception configuration change request
message to a base station.
Advantageous effects
[0010] According to the present invention, in the radio communication system supporting
various data traffics, it is possible to change the DRX configuration efficiently
so as to optimize power consumption of the terminal according to the traffic property.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011]
FIG. 1 is a flowchart illustrating the DRX operation procedure of the terminal.
FIG. 2 is a diagram illustrating an enhanced DRX method for reducing the power consumption
of the terminal according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating detailed operation procedure of the first embodiment
of the present invention.
FIG. 4 is a signal flow diagram illustrating the power consumption method of the terminal
according to the second embodiment of the present invention.
FIG. 5 is a signal flow diagram illustrating the operation procedure of the third
embodiment.
FIG. 6 is a block diagram illustrating the configuration of the terminal according
to an embodiment of the present invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0012] In the LTE system, Discontinuous Reception (DRX) is adopted to minimize power consumption
of the terminal. The terminal usually has to monitor the channel to detect the data
addressed to it. However, if the user monitors the channel all the time, this causes
significant power consumption. Accordingly, there is room for reducing the power consumption
of the UE in such a way that the terminal monitors the channel to detect data for
predetermined duration. This is referred to as DRX, and FIG. 1 shows a DRX operation
procedure.
[0013] FIG. 1 is a flowchart illustrating the DRX operation procedure of the terminal.
[0014] Part (a) of FIG. 1 shows the operation of the terminal in the case of no receipt
of data. The terminal monitors Physical Downlink Control Channel (PDCCH) as a downlink
control channel only in duration occurring periodically but not always. This period
is referred to as DRX cycle 100, and the PDCCH monitoring is limited to the DRX cycle
using an on-duration timer 105. That is, the on-duration timer starts at every DRX
cycle such that the terminal monitors PDCCH until the time expires.
[0015] In this case, the DRX cycle and the on-duration timer value is notified to the terminal
through a dedicated Radio Resource Control (RRC) message. The base station knows the
DRX cycle and on-duration timer value of each terminal and, if data addressed a certain
terminal, sends the scheduling information for the corresponding terminal on PDCCH
for the time duration of on-duration timer. If PDCCH carries the scheduling information
addressed to one terminal, DRX operates for the terminal to expand the time for monitoring
the channel with multiple timers.
[0016] Part (b) of FIG. 1 shows the DRX operation in the case that new scheduling information
is carried on PDCCH. If the scheduling information for the corresponding terminal
is carried on PDCCH for the on-duration of the terminal as denoted by reference number
110, the terminal starts the DRX inactivity timer 115 and retransmission timer (HARQ
RTT timer) 120. The active time of the terminal is expanded in the duration while
the DRX inactivity timer is running. That is, while the DRX inactivity timer is running,
the terminal continues monitoring PDCCH. If not scheduling information is carried
on PDCCH, the HARQ RTT time starts. There is no need for the terminal to monitor the
PDCCH before receiving new scheduling information for retransmission after transmitting
a NACK corresponding to the data transmitted by the base station. Accordingly, the
terminal refrains from monitoring PDCCH for the duration while the HARQ RTT timer
is active. That is, the HARQ RTT timer value is determined in consideration of the
Round Trip Time in HARQ operation. However, the other timers, i.e. DRX inactivity
timer and on-duration timer are running, the terminal stays in active state although
the HARQ RTT timer is active.
[0017] If the HARQ RTT timer has expired and the soft buffer data have not been decoded
successfully, the DRX retransmission timer 125 starts. If the corresponding DRX retransmission
timer starts, the terminal stays in active state. If scheduling information is received
again before the expire of the DRX retransmission timer as denoted by reference number
130, the terminal starts HARQ RTT timer and stops the currently running DRX retransmission
timer as denoted by reference number 135. Since the DRX inactivity timer stops as
denoted by reference number 140 and only the HARQ RTT timer is running, the terminal
leaves the active state. If the HARQ RTT timer expires without decoding the data successfully,
the DRX retransmission timer starts as denoted by reference number 145. If scheduling
information arrives before the expiry of the DRX retransmission timer as denoted by
reference number 150, the HARQ RTT timer starts and the DRX retransmission timer stops
as denoted by reference number 155. If the data in the soft buffer are decoded successfully
as denoted by reference number 175, the currently running HARQ RTT timer stops.
[0018] Meanwhile, although DRX makes it possible to reduce power consumption of the terminal,
there is room for reducing the power consumption more efficiently by adjusting the
DRX operation and configuration values dynamically. By taking notice of this, the
present invention proposes a method for reducing the power consumption efficiently.
[0019] FIG. 2 is a diagram illustrating an enhanced DRX method for reducing the power consumption
of the terminal according to an embodiment of the present invention.
[0020] First, the terminal receives scheduling information from the base station as denoted
by reference number 200. If it is determined that there is no more data to be transmitted/received
as denoted by reference number 205, the terminal configures the DRX inactivity timer
to become shorter as denoted by reference number 210, which has started at the timing
200, before expiry and configures the next DRX cycle to be longer as denoted by reference
number 215 or applying shorter on-duration as denoted by reference number 220 to reduce
power consumption further.
[0021] In order to accomplish this operation, there is a need of a mechanism for the terminal
to notify the base station of the current terminal traffic condition and incongruity
of the current DRX configuration. Also, there is a need of a mechanism for transmitting
DRX configuration for more power conservation to the terminal efficiently. The present
invention proposes such mechanisms.
[0022] The conventional DRX configuration can be classified into one of two levels depending
on the situation. That is, the two configurations of short DRX and long DRX are sent
to the terminal through RRC connection reconfiguration message in advance. The long
DRX has the DRX cycle longer than that of the short DRX while the timer-related configuration
values are not differentiated between the long and short DRXs. The default configuration
is the long DRX and, if the short DRX is required, the short DRX is triggered with
Media Access Control (MAC) CE. The short DRX is changed for the long DRX automatically
after being applied for predetermined time duration.
[0023] Accordingly, considering the power conservation, it is not appropriate for applying
the conventional DRX configuration.
[0024] In order to enhance the power conservation effect, it is necessary to adjust the
DRX inactivity timer and on-duration timer depending on the situation as wells as
the DRX cycle as described above.
[0025] The conventional DRX mechanism allows the base station to trigger the change from
the long DRX to the short DRX, but the change from the short DRX to the long DRX depends
on a timer. In order to save power, however, it should be allowed for switching the
short DRX to the long DRX or a longer DRX for more power saving at a wanted time.
[0026] Finally, the conventional DRX mechanism depends on the determination of the base
station without input from the terminal in switching between the DRX configurations.
However, there is a need of the data traffic condition of the terminal in order to
accomplish the efficient power conservation effect.
[0027] Descriptions are made of the methods for reducing power consumption according to
the first to third embodiments of the present invention hereinafter. In the first
embodiment, a description is made of the method for triggering an RRC message, i.e.
DRX configuration change request message, transmitted from a terminal to a base station.
In the second and third embodiments, descriptions are made of the methods for determining
DRX configuration value minimizing power consumption and requesting for changing DRX
configuration. The second and third embodiments are similar to each other with the
exception in the procedure of transmitting the DRX configuration change request message
to the base station.
<First embodiment
[0028] In the first embodiment of the present invention, a description is made of the method
for the terminal to trigger a RRC message requesting for change of DRX, i.e. DRX configuration
change request message, to be transmitted to the base station.
[0029] FIG. 3 is a flowchart illustrating detailed operation procedure of the first embodiment
of the present invention.
[0030] First, the terminal receives, from a higher layer, a report informing that there
is no more data to be transmitted to the base station at step 300. The terminal determines
whether DRX configuration change is necessary for reduction of power consumption based
on a few conditions at step 305. For example, the following three conditions may be
considered.
- The length of on-duration is longer than a predetermined threshold value?
- The long DRX cycle is shorter than a predetermined threshold value?
- The DRX inactivity length is longer than a predetermined threshold?
[0031] If at least one of the three conditions is not fulfilled, it is determined that DRX
change is necessary for reducing power consumption. In this case, the terminal triggers
an RRC control message, i.e. DRX configuration change request message at step 310.
An indicator indicating that there is no more data to be transmitted by the terminal
is included in the RRC control message at step 315.
[0032] Next, the terminal sends the base station the DRX configuration request message at
step 320.
[0033] Meanwhile, if a handover command is received before the receipt of a DRX configuration
change response message (RLC ACK) corresponding to the RRC message at step 325, the
terminal performs step 305 again in a new cell. Otherwise, if the DRX configuration
change response message is received from the base station, the terminal ends the DRX
configuration request procedure.
<Second embodiment
[0034] In the second embodiment of the present invention, a description is made of the method
for determining DRX configuration value for power consumption minimization and requesting
change of the DRX configuration. Particularly, a Signaling Connection Release Indication
(SCRI) message transmitted by the terminal is delivered through an uplink data channel
(e.g. MAC CE). The SCRI message is used to request for change of the DRX configuration
value for minimizing power consumption when there is no more data to be transmitted
by the terminal. In the following description, the term 'SCRI' is interchangeable
used with the term 'DRX configuration change request message."
[0035] FIG. 4 is a signal flow diagram illustrating the power consumption method of the
terminal according to the second embodiment of the present invention.
[0036] The base station 405 sets a DRX configuration value for minimizing the power consumption
of the terminal at step 410. This is to define a DRX configuration for power conservation
with DRX inactivity timer, DRX cycle, and on-duration timer in the range of values
tolerable in the system, and this is referred to as Power Serving Set in an embodiment
of the present invention. For example, the Power Serving Set may be provided with
the shortest DRX inactivity timer value, longest DRX cycle value, and shortest on-duration
timer value capable of being provided in the system.
[0037] Next, the base station sends the terminal 400 the Power Saving Set using the dedicated
RRC message, i.e. RRC connection reconfiguration message, at step 415. In response
to the Power Saving Set, the terminal sends the base station an RRC connection reconfiguration
complete message at step 420.
[0038] The terminal and the base station communicate data to each other at step 425. If
there is no more data to transmit at step 430, the terminal compares the current DRX
configuration value with the Power Serving Set value received previously from the
base station at step 435.
[0039] If at least one currently configured DRX configuration values, i.e. DRX inactivity
timer value, DRX cycle value, and on-duration timer value, mismatch the Power Saving
Set, the terminal determines that it is necessary to adjust the current DRX configuration
value. At this time, the terminal sends the base station a DRX configuration change
request message (i.e. SCRI message) at step 440. The DRX configuration change request
message (SCRI) transmission condition is fulfilled when the terminal has no more data
to be transmitted and when it is necessary to compare the previous Power Saving Set
and the current DRX configuration or the more efficient DRX configuration is required
as compared to the current DRX configuration. Also, the DRX configuration change request
message may be transmitted when the terminal is not scheduled for a predetermined
time.
[0040] With the transmission of the DRX configuration change request message (SCRI message),
an SCRI timer starts. The SCRI timer may be used as DRX configuration change request
message retransmission condition.
[0041] Upon receipt of the DRX configuration change request message (SCRI), the base station
determines that the terminal's DRX configuration values are required to be changed
to the Power Saving Set values at step 450. Accordingly, the base station sends the
terminal a DRX configuration change response message indicating change of the DRX
configuration values to the power saving set in the MAC CE at step 455. In order to
accomplish this, a new MAC CE has to be defined. Also, it is necessary to define a
new LCID to identify the new MAC CE.
[0042] Upon receipt of the DRX configuration change response message from the base station,
the terminal sets the terminal's DRX configuration values to the Power Saving Set
values, at step 460, using the Power Saving Set configuration information received
from the base station previously.
[0043] Meanwhile, the terminal may not receive the DRX configuration change response message
from the base station at step 465 until the timer started at step 445 expires. If
the terminal is not configured with the Power Saving Set before the expiry of the
timer, the terminal retransmits the DRX configuration change request message (SCRI)
to the base station at step 470. At this time, the corresponding timer restarts at
step 475.
[0044] In this way, the DRX configuration change request message (SCRI) retransmission is
determined based on the timer. That is, if it fails to change for the Power Saving
Set until the timer expires, the SCRI is retransmitted. If it is determined to refrain
from change at step 480, the base station sends the terminal a MAC CE indicating the
related DRX command at step 485. Here, it is possible to stop the timer or restart
the timer at step 490. If the timer expires again at step 495, the terminal may retransmit
the SCRI message. As the SCRI retransmission condition, the timer stops or restarts
when scheduling information is received or when SR occurs. If the scheduling information
is received or SR occurs, the SCRI message transmission is suspended because it is
inappropriate to configure with the power saving set.
<Third embodiment
[0045] In the third embodiment of the present invention, a description is made of the method
for determining DRX configuration value for power consumption minimization and requesting
change of the DRX configuration. The third embodiment is similar to the second embodiment
with the exception that the Signaling Connection Release Indication (SCRI) transmitted
by the terminal is delivered in a control message, i.e. RRC message. In the following
description, the term 'SCRI' is interchangeable used with the term 'DRX configuration
change request message."
[0046] FIG. 5 is a signal flow diagram illustrating the operation procedure of the third
embodiment.
[0047] Steps 510 to 545 of FIG. 5 are identical with steps 410 to 445 of FIG. 4. If it is
determined that the terminal's Power Saving Set is necessary to be changed at step
550, the base station sends the terminal a dedicated RRC message, i.e. RRC connection
Reconfiguration (RRCConnectionReconfiguration) message at step 555. The RRC connection
Reconfiguration (RRCConnectionReconfiguration) may include only the indicator indicating
to change the terminal's DRX configuration values for the power saving set values
store in the terminal previously or newly configure DRX configuration information.
The RRC Connection Reconfiguration message may make it possible for the base station
to perform control flexibly in adaptation to the situation.
[0048] FIG. 6 is a block diagram illustrating the configuration of the terminal according
to an embodiment of the present invention.
[0049] The terminal includes a transceiver 650, a DRX calculator 615, a controller 610,
a multiplexer/demultiplexer 620, a control message processor 635, and various higher
layer devices 635 and 630.
[0050] The transceiver 650 receives data and predetermined control signals on downlink carriers
and transmits data and predetermined control signals on uplink carriers.
[0051] The control unit 610 controls overall operations for optimizing power consumption
of the terminal and signal flows among the function blocks.
[0052] In more detail, the control unit 610 instructs the multiplexer/demultiplexer 620
to generate MAC PDU according to the control signal, i.e. the scheduling information
indicated in the uplink grant, provided by the transceiver 650. The control unit determines
whether to change DRX configuration and, if it is necessary to change DRX configuration,
instructs the optimal DRX calculator 615 to calculate optimal DRX configuration value.
Whether to change DRX is determined based on the SCRI message sent by the control
message processor 635. The control unit 610 controls the multiplexer/demultiplexer
620 such that the scheduling information is transmitted according to the DRX cycle.
The control unit 610 transmits the optimal DRX configuration value provided by the
DRX calculator 615 to the multiplexer/demultiplexer. The optimal DRX calculator 615
calculates the optimal DRX configuration value and sends it to the controller 610
under the control of the controller 610. The DRX configuration value is processed
so as to be transmitted to the terminal by means of the control message processor
635.
[0053] The multiplexer/demultiplexer 620 multiplexes the data generated by the higher layer
device 625 and the control message processor 635 or demultiplexes the data received
by means of the transceiver to deliver the demultiplexed data to appropriate higher
layer device 625 or the control message processor 635.
[0054] The control message processor 630 processes the control message transmitted by the
network and takes a necessary action. For example, the control message processor 635
may send the PHR parameter contained in the control message to the controller 610
or send the newly activated carriers information to the transceiver 605 such that
the transceiver is configured with the carriers. The higher layer device 625 may be
established per service and process the data generated by user service such as FTP
or VoIP to the multiplexer or process the data from the demultiplexer 620 to the higher
layer service application.
[0055] Although the description is directed to the case where the terminal consists of separate
blocks responsible for different functions, this is just an example but not limited
to the separated function block configuration. For example, the controller 610 may
perform all the above-described functions by itself.
[0056] In detail, the controller 610 may determine that it is necessary to change DRX configuration
of the terminal and control to transmit a DRX configuration change request message
to the base station.
[0057] In this case, according to the first embodiment of the present invention, if the
length of on duration is long than a predetermined threshold, if the long DRX cycle
is shorter than a predetermined threshold, or if the DRX inactivity length is longer
than a predetermined threshold, the controller 610 determines that there is a need
of changing the DRX configuration. The DRX configuration change request message may
include an indicator indicating that the terminal has no more data to transmit.
[0058] Meanwhile, in the first embodiment of the present invention, a handover command is
received before receiving the ACK message corresponding to the DRX configuration change
request message from the base station, the control unit may perform handover to determine
whether the DRX configure has to be changed in the new cell.
[0059] In the case of the second embodiment of the present invention, the control unit 610
may control to receive a Power Saving Set including at least one DRX configuration
value from the base station. The Power Saving Set may include at least one of a DRX
inactivity timer value, a DRX cycle value, and an on-duration timer value.
[0060] In the case that there is no data to be transmitted to the base station, the control
unit 610 may compare the current DRX configuration value with the configuration value
contained in the Power Saving Set. If at least one configuration value mismatch, the
control unit 610 may trigger transmission of DRX configuration change request message
to the base station.
[0061] In this case, the DRX configuration change request message is transmitted to the
base station in a MAC CE through a data channel in the second embodiment and in an
RRC message through a control channel.
[0062] If a DRX configuration change response message is received from the base station,
the control unit 610 controls to change the DRX configuration value of the terminal
with the configuration information of the Power Saving Set carried in the message.
1. A method by a terminal in a wireless communication system, the method comprising:
receiving (415, 515), from a base station, configuration information indicating the
terminal to provide preferred power related information;
determining (435, 535) whether current preferred power related information is different
from previous preferred power related information; and
transmitting (440, 470, 540, 570), to the base station, a message including the current
preferred power related information, in case that the current preferred power related
information is different from the previous preferred power related information and
a timer associated with the transmission of the message is not running,
wherein the timer is started or restarted, in case that the message is transmitted.
2. The method of claim 1, further comprising:
determining to transmit the message, in case that the terminal has no data to be transmitted.
3. The method of claim 1, wherein the preferred power related information includes at
least one of a predetermined discontinuous reception inactivity timer value, a discontinuous
reception cycle value, and an on-duration timer value.
4. The method of claim 1, further comprising:
receiving, from the base station, a response message in response to the message; and
changing power related configuration of the terminal using preferred power related
information included in the response message.
5. A terminal in a wireless communication system, the terminal comprising:
a transceiver (605); and
a controller (610) coupled with the transceiver and configured to:
receive (415, 515), from a base station, configuration information indicating the
terminal to provide preferred power related information,
determine (435, 535) whether current preferred power related information is different
from previous preferred power related information, and
transmit (470, 570), to the base station, a message including the current preferred
power related information, in case that the current preferred power related information
is different from the previous preferred power related information and a timer associated
with the transmission of the message is not running, wherein the timer is started
or restarted, in case that the message is transmitted.
6. The terminal of claim 5, wherein the terminal is configured to perform the method
of any of claims 2 to 4.
7. A method by a base station in a wireless communication system, the method comprising:
generating (410, 510) configuration information indicating a terminal to provide preferred
power related information of the terminal;
transmitting (415, 515), to the terminal, the configuration information; and
receiving (470, 570), from the terminal, a message including the preferred power related
information, in case that current preferred power related information of the terminal
is different from previous preferred power related information of the terminal and
a timer associated with a transmission of the message is not running,
wherein the timer is started or restarted, in case that the message is received.
8. The method of claim 7, wherein the receiving of the message is performed, in case
that the terminal has no data to be transmitted.
9. The method of claim 7, wherein the preferred power related information includes at
least one of a predetermined discontinuous reception inactivity timer value, a discontinuous
reception cycle value, and an on-duration timer value.
10. The method of claim 7, further comprising:
transmitting, to the terminal, a response message in response to the message, and
wherein power related configuration of the terminal is changed using preferred power
related information included in the response message.
11. A base station configured to perform the method of any of claims 7 to 10.
1. Verfahren durch ein Endgerät in einem drahtlosen Kommunikationssystem, wobei das Verfahren
Folgendes umfasst:
Empfangen (415, 515) von Konfigurationsinformationen von einer Basisstation, die dem
Endgerät angeben, bevorzugte leistungsbezogene Informationen bereitzustellen;
Bestimmen (435, 535), ob sich aktuelle bevorzugte leistungsbezogene Informationen
von vorherigen bevorzugten leistungsbezogenen Informationen unterscheiden; und
Übertragen (440, 470, 540, 570) einer Nachricht an die Basisstation einschließlich
der aktuellen bevorzugten leistungsbezogenen Informationen, falls sich die aktuellen
bevorzugten leistungsbezogenen Informationen von den vorherigen bevorzugten leistungsbezogenen
Informationen unterscheiden und ein Zeitgeber, der der Übertragung der Nachricht zugeordnet
ist, nicht ausgeführt wird,
wobei der Zeitgeber gestartet oder erneut gestartet wird, falls die Nachricht übertragen
wird.
2. Verfahren nach Anspruch 1, das ferner Folgendes umfasst:
Bestimmen, dass die Nachricht übertragen wird, falls das Endgerät keine zu übertragenen
Daten hat.
3. Verfahren nach Anspruch 1, wobei die bevorzugten leistungsbezogenen Informationen
mindestens einen vorbestimmten diskontinuierlichen Empfangsinaktivitätszeitgeberwert,
einen diskontinuierlichen Empfangszykluswert und/oder einen Dauerzeitgeberwert einschließen.
4. Verfahren nach Anspruch 1, das ferner Folgendes umfasst:
Empfangen einer Antwortnachricht von der Basisstation als Antwort auf die Nachricht;
und
Ändern der leistungsbezogenen Konfiguration des Endgeräts unter Verwendung von bevorzugten
leistungsbezogenen Informationen, die in der Antwortnachricht eingeschlossen sind.
5. Endgerät in einem drahtlosen Kommunikationssystem, wobei das Endgerät Folgendes umfasst:
einen Transceiver (605); und
eine Steuerung (610), die mit dem Transceiver verbunden und für Folgendes konfiguriert
ist:
Empfangen (415, 515) von Konfigurationsinformationen von einer Basisstation, die dem
Endgerät angeben, bevorzugte leistungsbezogene Informationen bereitzustellen,
Bestimmen (435, 535), ob sich aktuelle bevorzugte leistungsbezogene Informationen
von vorherigen bevorzugten leistungsbezogenen Informationen unterscheiden, und
Übertragen (470, 570) einer Nachricht an die Basisstation einschließlich der aktuellen
bevorzugten leistungsbezogenen Informationen, falls sich die aktuellen bevorzugten
leistungsbezogenen Informationen von den vorherigen bevorzugten leistungsbezogenen
Informationen unterscheiden und ein Zeitgeber, der der Übertragung der Nachricht zugeordnet
ist, nicht ausgeführt wird, wobei der Zeitgeber gestartet oder erneut gestartet wird,
falls die Nachricht übertragen wird.
6. Endgerät nach Anspruch 5, wobei das Endgerät zum Durchführen des Verfahrens nach einem
der Ansprüche 2 bis 4 konfiguriert ist.
7. Verfahren durch eine Basisstation in einem drahtlosen Kommunikationssystem, wobei
das Verfahren Folgendes umfasst:
Erzeugen (410, 510) von Konfigurationsinformationen, die einem Endgerät angeben, bevorzugte
leistungsbezogene Informationen des Endgeräts anzugeben;
Übertragen (415, 515) der Konfigurationsinformationen an das Endgerät; und
Empfangen (470, 570) einer Nachricht von dem Endgerät einschließlich der bevorzugten
leistungsbezogenen Informationen, falls sich aktuelle bevorzugte leistungsbezogene
Informationen des Endgeräts von vorherigen bevorzugten leistungsbezogenen Informationen
unterscheiden und ein Zeitgeber, der einer Übertragung der Nachricht zugeordnet ist,
nicht ausgeführt wird,
wobei der Zeitgeber gestartet oder erneut gestartet wird, falls die Nachricht empfangen
wird.
8. Verfahren nach Anspruch 7, wobei das Empfangen der Nachricht durchgeführt wird, falls
das Endgerät keine zu übertragenen Daten hat.
9. Verfahren nach Anspruch 7, wobei die bevorzugten leistungsbezogenen Informationen
mindestens einen vorbestimmten diskontinuierlichen Empfangsinaktivitätszeitgeberwert,
einen diskontinuierlichen Empfangszykluswert und/oder einen Dauerzeitgeberwert einschließen.
10. Verfahren nach Anspruch 7, das ferner Folgendes umfasst:
Übertragen einer Antwortnachricht an die Basisstation als Antwort auf die Nachricht,
und
wobei leistungsbezogene Konfiguration des Endgeräts unter Verwendung von bevorzugten
leistungsbezogenen Informationen, die in der Antwortnachricht eingeschlossen sind,
geändert wird.
11. Basisstation, die zum Durchführen des Verfahrens nach einem der Ansprüche 7 bis 10
konfiguriert ist.
1. Procédé par un terminal dans un système de communication sans fil, le procédé comprenant
:
recevoir (415, 515), à partir d'une station de base, des informations de configuration
indiquant au terminal de fournir des informations liées à la puissance préférée ;
déterminer (435, 535) si les informations liées à la puissance préférée actuelles
sont différentes des informations liées à la puissance préférée précédentes ; et
transmettre (440, 470, 540, 570), à la station de base, un message incluant les informations
liées à la puissance préférée actuelles, si les informations liées à la puissance
préférée actuelles sont différentes des informations liées à la puissance préférée
précédentes et qu'un temporisateur associé à la transmission du message n'est pas
en cours d'exécution,
où le temporisateur est démarré ou redémarré, dans le cas où le message serait transmis.
2. Procédé selon la revendication 1, comprenant en outre :
déterminer de transmettre le message, dans le cas où le terminal n'aurait pas de données
à être transmises.
3. Procédé selon la revendication 1, où les informations liées à la puissance préférée
comprennent au moins l'une d'une valeur de temporisateur d'inactivité de réception
discontinue prédéterminée, une valeur de cycle de réception discontinue et une valeur
de temporisateur de durée d'activité.
4. Procédé selon la revendication 1, comprenant en outre :
recevoir, à partir de la station de base, un message de réponse en réponse au message
; et
changer la configuration liée à la puissance du terminal en utilisant les informations
liées à la puissance préférée incluses dans le message de réponse.
5. Terminal dans un système de communication sans fil, le terminal comprenant :
un émetteur-récepteur (605) ; et
un contrôleur (610) couplé à l'émetteur-récepteur et configuré pour :
recevoir (415, 515), à partir d'une station de base, des informations de configuration
indiquant au terminal de fournir des informations liées à la puissance préférée,
déterminer (435, 535) si des informations liées à la puissance préférée actuelles
sont différentes d'informations liées à la puissance préférée précédentes, et
transmettre (440, 470, 540, 570), à la station de base, un message incluant les informations
liées à la puissance préférée actuelles, si les informations liées à la puissance
préférée actuelles sont différentes des informations liées à la puissance préférée
précédentes et qu'un temporisateur associé à la transmission du message n'est pas
en cours d'exécution, où le temporisateur est démarré ou redémarré, dans le cas où
le message serait transmis.
6. Terminal selon la revendication 5, où le terminal est configuré pour effectuer le
procédé selon l'une quelconque des revendications 2 à 4.
7. Procédé par une station de base dans un système de communication sans fil, le procédé
comprenant :
générer (410, 510) des informations de configuration indiquant à un terminal de fournir
des informations liées à la puissance préférée du terminal ;
transmettre (415, 515), au terminal, des informations de configuration ; et
recevoir (470, 570), à partir du terminal, un message incluant les informations liées
à la puissance préférée, si les informations liées à la puissance préférée actuelles
du terminal sont différentes des informations liées à la puissance préférée précédentes
du terminal et qu'un temporisateur associé à une transmission du message n'est pas
en cours d'exécution,
où le temporisateur est démarré ou redémarré, dans le cas où le message serait reçu.
8. Procédé selon la revendication 7, où la réception du message est accomplie, dans le
cas où le terminal n'aurait pas de données à être transmises.
9. Procédé selon la revendication 7, où les informations liées à la puissance préférée
comprennent au moins l'une d'une valeur de temporisateur d'inactivité de réception
discontinue prédéterminée, une valeur de cycle de réception discontinue et une valeur
de temporisateur de durée d'activation.
10. Procédé selon la revendication 7, comprenant en outre :
transmettre, au terminal, un message de réponse en réponse au message, et
où la configuration liée à la puissance du terminal est changée en utilisant des informations
liées à la puissance préférée incluses dans le message de réponse.
11. Station de base configurée pour effectuer le procédé selon l'une quelconque des revendications
7 à 10.